Skip navigation
Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/19894
Title: Effect of different ions present in fresh water on performance of polyvinylamine based ASA emulsion
Authors: Kumar A.
Bhardwaj N.K.
Singh S.P.
Published in: Journal of Dispersion Science and Technology
Abstract: Alkenyl succinic anhydride (ASA) is an alkaline sizing chemical used during papermaking. ASA emulsified in conventionally used cationic starch (CS) solution, has low shelf life i.e. 20–25 minutes and forms stickies/deposits as a result of hydrolyzed ASA on paper machine wire. Anionic polyvinylamine (APVAm) dilution in de-ionized water as a substitute to CS for ASA emulsification is a protective colloid, which seems to provide a protective shield to the ASA molecules, thereby reducing hydrolysis. In that case, the ASA emulsion was found to be stable up to four hours. In our knowledge no reliable studies have been done on study of different ions present in fresh water used for the preparation of APVAm stabilized ASA emulsion for commercial utilization. The present communication relates to the study on effect of different ions viz. Ca , Mg , Cl , SO & HCO present in fresh water on the performance of ASA emulsion prepared by using APVAm as protective colloid. The permissible limit of each ion was measured. It was observed that the concentration of calcium ions was higher than the maximum permissible limit which may be responsible for the poor emululsification of ASA. The concentrations of Mg ions and other counter ions were less than that of the maximum allowable limit. It was also observed that chloride ions adversely affected while bicarbonate ions assisted the ASA emulsification.
Citation: Journal of Dispersion Science and Technology(2020), 41(2): 307-313
URI: https://doi.org/10.1080/01932691.2019.1572513
http://repository.iitr.ac.in/handle/123456789/19894
Issue Date: 2020
Publisher: Taylor and Francis Inc.
Keywords: Alkaline sizing
alkenyl succinic anhydride
Cobb60
different ions
polyvinylamine
Alkalinity
Chlorine compounds
Emulsification
Hydrolysis
Papermaking
Protective colloids
Sizing (finishing operation)
Sols
Water
Alkaline sizing
Alkenyl succinic anhydride
Bicarbonate ions
Cationic starches
Cobb60
Concentration of calcium ion
ISSN: 1932691
Author Scopus IDs: 57221101859
55954738000
7407864677
Author Affiliations: Kumar, A., Department of Paper Technology, Indian Institute of Technology Roorkee–Saharanpur Campus, Saharanpur, India, Avantha Centre for Industrial Research & Development, Yamuna Nagar, India
Bhardwaj, N.K., Avantha Centre for Industrial Research & D
Funding Details: Authors are immensely obliged to Director, Avantha Centre for Industrial R&D (ACIRD), Yamuna Nagar (Haryana) for permitting to conduct the study in ACIRD. First author would like to appreciate the support of Mr. Vipul Gupta for his help in chemical calcul.
Corresponding Author: Bhardwaj, N.K.; Avantha Centre for Industrial Research & DevelopmentIndia; email: bhardwaj@avantharesearch.org
Appears in Collections:Journal Publications [PT]

Files in This Item:
There are no files associated with this item.
Show full item record


Items in Repository are protected by copyright, with all rights reserved, unless otherwise indicated.